Originally Posted by token385

Here is what I got returned when trying to pre-assign a seat
Please note that there are some restrictions because the reservation made by other than JAL' reservation system.
It might not be updated.
It might not be shown all.
Unable to assign or change your seats through JAL home page.
Please ask your travel agents or airlines you asked.
If you made the reservation on other than JAL home page at Japan region, please call JMB award reservations and services.

Since I am in "O" class I assumed that the above was the case. I did however think that PLT status would have given me some benefit